ASUS PRIME B850M-K AM5 micro-ATX Motherboard

ASUS PRIME B850M-K AM5 micro-ATX Motherboard

The ASUS PRIME B850M-K motherboard is your gateway to next-generation performance.

Get ready to build your dream platform with theASUS PRIME B850M-K, designed specifically to unleash the hidden power of the latest AMD processors. With its compact size (micro-ATX) and meticulous engineering design, this motherboard offers the perfect blend of future technologies, exceptional stability, and excellent value, making it the ideal choice for professionals, content creators, and gamers seeking uncompromising performance.

Key features and technical specifications:

1. Comprehensive support for the latest generation processors.

• Advanced Socket:The motherboard comes with aAMD AM5socket and officially supports the AMD Ryzen™ 9000, 8000, and 7000 series processors.

• Powerful Energy:Designed to handle processor power up to170 watts, ensuring complete stability even with the most powerful processors under high load.

2. Memory Speeds (DDR5) Beyond Limits

• Exceptional Performance:The motherboard supports two DIMM memory slots with a capacity of up to128 GBofDDR5..

• Amazing Overclocking:Thanks to ASUS AEMP and AMD EXPO™ technologies, you can achieve incredible speeds of up to9600+ MT/swith Ryzen 8000 processors, and8200+ MT/swith the 9000 series, ensuring instant system responsiveness.

3. Fifth Generation Graphics and Storage (PCIe 5.0)

• Expansion Slots:Enjoy double bandwidth with thePCIe 5.0 x16main slot (for 9000 and 7000 processors), preparing you for the most powerful future graphics cards.

• Ultra-Fast Storage:The motherboard features two M.2 slots, one of which supportsPCIe 5.0 x4for unprecedented read and write speeds, along with 4 SATA 6Gb/s ports to support multiple storage options and RAID technologies.

4. Exceptional Cooling and Comprehensive Protection

• ASUS Thermal Solution:The motherboard comes equipped with advanced heatsinks for the VRM (Voltage Regulator Module) and a dedicated heatsink for M.2 slots to ensure performance does not drop due to heat.

• ASUS 5X PROTECTION III:A comprehensive protection system that includes overvoltage protection, DIGI+ VRM technology for stable power, and rear ports made of stainless steel.

5. Network connectivity and high-speed ports

• Professional network:Equipped with an Ethernet portRealtek 2.5Gbfor lag-free internet and gaming speeds, with LANGuard network protection technology.

• Multiple USB ports:Includes a total of 15 USB ports, with rear ports at10Gbps, and support for a frontUSB Type-C®port for faster and more flexible connections.

• Ultra HD display:Integrated display ports include DisplayPort (supports up to 8K resolution) and HDMI 2.1 (supports 4K@60Hz).

6. Immersive audio experience (7.1 Surround Sound)

• Enjoy pure, high-definition sound (up to 24-Bit/192 kHz) thanks to the Realtek audio chip, premium Japanese audio capacitors, and isolated circuits (Audio Shielding) that prevent electromagnetic interference.

7. Easy installation and customization (DIY Friendly)

• Q-Design features:Includes Q-LED Core for error detection, and Q-Slot and Q-DIMM for easy installation and removal of cards and RAM.

• BIOS FlashBack™:A dedicated button for easily updating the BIOS interface without the need to install a processor or memory.

• Aura Sync lighting:3 second-generation headers for ARGB lighting to customize your device's appearance and synchronize it with other components.

Whether you are upgrading your old device or building a completely new platform, this motherboard provides you with the "solid foundation" you need. By offering the latest fifth-generation technologies (PCIe 5.0 and DDR5) in a compact and economical design, ASUS ensures performance that stands the test of time and reliability that lasts for years to come.

Specifications of the ASUS PRIME B850M-K AM5 micro-ATX Motherboard

Model

• PRIME B850M-K

News & Updates

• Socket AM5, Please visit our GLOBAL website to check and download the latest updates.

CPU

• AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors*

• Supports up to AMD 170W CPU

  • Refer tohttps://www.asus.com/support/download-center/for CPU support list.

Chipset

• AMD B850 Chipset

Memory

• 2 x DIMM slots, max. 128GB, DDR5

• Supported Speeds: 8200+MT/s(OC) with Ryzen™ 9000 Series, 9600+MT/s(OC) with Ryzen™ 8000 Series, 8000+MT/s(OC) with Ryzen™ 7000 Series

• ECC and Non-ECC Un-buffered DIMM*

• Dual channel memory architecture

• Supports AMD Extended Profiles for Overclocking (EXPO™)

• ASUS Enhanced Memory Profile (AEMP)

  • Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration.

  • Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

Graphics

• 1 x DisplayPort (Supports max. 8K@30Hz as specified in DisplayPort 1.4)

• 1 x HDMI™ port*** (Supports 4K@60Hz as specified in HDMI 2.1)

  • Graphics specifications may vary between CPU types.

Expansion Slots

• AMD Ryzen™ 9000 & 7000 Series Desktop Processors: 1 x PCIe 5.0 x16 slot (supports x16 mode)*

• AMD Ryzen™ 8000 Series Desktop Processors: 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)

• AMD B850 Chipset: 1 x PCIe 4.0 x16 slot (supports x4 mode)

  • Please check the PCIe bifurcation table on the ASUS support site.

• Specifications vary by CPU types.

Storage

• Supports 2 x M.2 slots and 4 x SATA 6Gb/s ports

• AMD Ryzen™ 9000 & 7000 Series Desktop Processors: M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode), M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)

• AMD Ryzen™ 8000 Series Desktop Processors: M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode), M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)*

• AMD B850 Chipset: 4 x SATA 6Gb/s ports

• AMD RAIDXpert2 Technology: Ryzen™ 9000 Series (RAID 0/1/5/10), Ryzen™ 8000 Series (RAID 0/1), Ryzen™ 7000 Series (RAID 0/1/10)

Ethernet

• 1 x Realtek 2.5Gb Ethernet

• ASUS LANGuard

USB

• Rear USB (Total 8 ports): 2 x USB 10Gbps ports (2 x Type-A), 2 x USB 5Gbps ports (2 x Type-A), 4 x USB 2.0 ports (4 x Type-A)

• Front USB (Total 7 ports): 1 x USB 5Gbps connector (supports USB Type-C®), 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports, 2 x USB 2.0 headers support 4 additional USB 2.0 ports

  • USB Type-C® power delivery output: max. 5V/3A

Audio

• Realtek 7.1 Surround Sound High Definition Audio CODEC*

• Audio Features: Jack-detection, Multi-streaming, Front Panel Jack-retasking, up to 24-Bit/192 kHz playback

• Audio Shielding, Premium audio capacitors, Dedicated audio PCB layers

  • A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Back Panel I/O Ports

• 2 x USB 10Gbps ports (2 x Type-A)

• 2 x USB 5Gbps ports (2 x Type-A)

• 4 x USB 2.0 ports (4 x Type-A)

• 1 x DisplayPort

• 1 x HDMI™ port

• 1 x Realtek 2.5Gb Ethernet port

• 3 x Audio jacks

• 1 x BIOS FlashBack™ button

• 1 x PS/2 Keyboard/Mouse combo port

Internal I/O Connectors

• Fan and Cooling: 1 x 4-pin CPU Fan header, 3 x 4-pin Chassis Fan headers

• Power: 1 x 24-pin Main Power connector, 1 x 8-pin +12V CPU Power connector

• Storage: 2 x M.2 slots (Key M), 4 x SATA 6Gb/s ports

• USB: 1 x USB 5Gbps connector (supports USB Type-C®), 1 x USB 5Gbps header (supports 2 ports), 2 x USB 2.0 headers (support 4 ports)

• Miscellaneous: 3 x Addressable RGB Gen 2 headers, 1 x Clear CMOS header, 1 x COM Port header, 1 x Front Panel Audio header (F_AUDIO), 1 x S/PDIF Out header, 1 x SPI TPM header (14-1 pin), 1 x 10-1 pin System Panel header

Special Features

• ASUS 5X PROTECTION III: DIGI+ VRM, LANGuard, Overvoltage protection, SafeSlot, Stainless-steel back I/O

• ASUS Q-Design: Q-Dashboard, Q-DIMM, Q-LED Core, Q-Slot

• ASUS Thermal Solution: M.2 heatsink, VRM heatsink design

• ASUS EZ DIY: BIOS FlashBack™ button, BIOS FlashBack™ LED, SafeSlot

• Aura Sync: Addressable RGB Gen 2 headers

Software Features

• ASUS Exclusive Software: Armoury Crate (Aura Creator, Aura Sync, Fan Xpert 2+), ASUS AI Advisor, ASUS DriverHub, TurboV Core, ASUS CPU-Z

• Third-Party Software: Adobe Creative Cloud (Free Trial), Norton 360 Deluxe (60 Days Free Trial), WinRAR (40 Days Free Trial)

• UEFI BIOS & ASUS EZ DIY: ASUS CrashFree BIOS 3, ASUS EZ Flash 3, ASUS UEFI BIOS EZ Mode, ASUS MyHotkey

BIOS

• 256 Mb Flash ROM, UEFI AMI BIOS

Manageability

• WOL by PME, PXE

Accessories

• Cables: 2 x SATA 6Gb/s cables

• Miscellaneous: 1 x I/O Shield, 1 x M.2 rubber package, 1 x Screw package for M.2 SSD

• Documentation: 1 x Quick start guide

Operating System

• Windows® 11, Windows® 10 64-bit

Form Factor

• micro-ATX Form Factor

• 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )